Here is a google translate of the synopsis of Heide Park's Wing Coaster.

"Flying demons were conjured up by villagers. A mistake. For since they always need new souls to renew their energy to become stronger and to continue their flight. The villagers sacrifice the souls of the visitors to save their own souls.

You walk into the abandoned village, you have to ask yourself the demons. Others have tried to stop the demons. But no obstacle can stop them. The demons pull you with it, you press with four times your body weight on their wings and race at blistering speeds on obstacles. With nothing above and nothing below you and eight different flight maneuvers rob you the demons in the Wing Coaster any orientation.

No one can stop them. You want your soul. You'll never be yourself. Are you doomed? Or you can save your soul?"